/**
 * Copyright 2019 Anthony Trinh
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ch.qos.logback.classic.issue.lbclassic36;

import junit.framework.TestCase;
import junit.framework.Test;
import junit.framework.TestSuite;

import java.text.SimpleDateFormat;
import java.util.Date;

//import org.joda.time.format.DateTimeFormatter;
//import org.joda.time.format.DateTimeFormat;
//import org.joda.time.DateTime;

public class DateFormatOriginal_tzest extends TestCase {
  public static final String ISO8601_PATTERN = "yyyy-MM-dd HH:mm:ss,SSS";
  static final long NANOS_IN_ONE_SEC = 1000 * 1000 * 1000L;

  /**
   * Create the test case
   * 
   * @param testName
   *                name of the test case
   */
  public DateFormatOriginal_tzest(String testName) {
    super(testName);
  }

  /**
   * @return the suite of tests being tested
   */
  public static Test suite() {
    return new TestSuite(DateFormatOriginal_tzest.class);
  }

  public static void main(String[] args) {
    junit.textui.TestRunner.run(suite());
  }

  public void setUp() throws Exception {
    super.setUp();
  }

  public void tearDown() throws Exception {
    super.tearDown();
  }

//  public void testRaw() throws Exception {
//    SimpleDateFormat simpleFormat = new SimpleDateFormat(ISO8601_PATTERN);
//    DateTimeFormatter jodaFormat = DateTimeFormat.forPattern(ISO8601_PATTERN);
//
//    Date date = new Date();
//    DateTime dateTime = new DateTime(date);
//
//    long start = System.nanoTime();
//    for (int i = 0; i < 100000; ++i) {
//      jodaFormat.print(dateTime);
//    }
//    long jodaAvg = (System.nanoTime() - start) / 100000;
//
//
//     start = System.nanoTime();
//    for (int i = 0; i < 100000; ++i) {
//      simpleFormat.format(date);
//    }
//    long simpleAvg = (System.nanoTime() - start) / 100000;
//
//    float diff = (((float) (simpleAvg - jodaAvg)) / simpleAvg) * 100;
//    System.out.println("Raw - JDK: " + simpleAvg + " ns Joda: " + jodaAvg
//        + " ns - Difference: " + diff + "%");
//  }

  public void testSynchronized() throws Exception {
    SynchronizedDateFormatter formatter = new SynchronizedDateFormatter();
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new Thread[threads];
    Date date = new Date();

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateFormatThread(formatter, date, iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("Synchronized DateFormat: %,.4f seconds\n", actual);

  }

  public void testUnSynchronized() throws Exception {
    UnsynchronizedDateFormatter formatter = new UnsynchronizedDateFormatter();
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new Thread[threads];
    Date date = new Date();

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateFormatThread(formatter, date, iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("Unsynchronized DateFormat: %,.4f seconds\n", actual);

  }

  public void testThreadLocal() throws Exception {
    ThreadLocalDateFormatter formatter = new ThreadLocalDateFormatter();
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new Thread[threads];
    Date date = new Date();

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateFormatThread(formatter, date, iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("ThreadLocal DateFormat: %,.4f seconds\n", actual);

  }

//  public void testDateTimeFormatter() throws Exception {
//    int threads = 10;
//    int iterations = 10000;
//    Thread[] formatThreads = new DateTimeFormatThread[threads];
//    JodaFormatter formatter = new JodaFormatter();
//    Date date = new Date();
//    DateTime dateTime = new DateTime(date);
//
//    for (int i = 0; i < threads; i++) {
//      formatThreads[i] = new DateTimeFormatThread(formatter, dateTime,
//          iterations);
//    }
//    long start = System.nanoTime();
//    for (Thread thread : formatThreads) {
//      thread.start();
//    }
//    for (Thread thread : formatThreads) {
//      thread.join();
//    }
//    long end = System.nanoTime();
//    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
//    System.out.printf("Joda DateTimeFormatter: %,.4f seconds\n", actual);
//
//  }

  public interface Formatter {
    String format(Date date);
  }

  public static class SynchronizedDateFormatter implements Formatter {
    SimpleDateFormat simpleFormat = new SimpleDateFormat(ISO8601_PATTERN);

    public synchronized String format(Date date) {
      return simpleFormat.format(date);
    }
  }

  public static class UnsynchronizedDateFormatter implements Formatter {
    public synchronized String format(Date date) {
      return new SimpleDateFormat(ISO8601_PATTERN).format(date);
    }
  }

  public static class ThreadLocalDateFormatter implements Formatter {
    ThreadLocal<SimpleDateFormat> formatter = new ThreadLocal<SimpleDateFormat>() {
      protected synchronized SimpleDateFormat initialValue() {
        return new SimpleDateFormat(ISO8601_PATTERN);
      }
    };

    public String format(Date date) {
      return formatter.get().format(date);
    }
  }

//  public static class JodaFormatter {
//    DateTimeFormatter formatter = DateTimeFormat.forPattern(ISO8601_PATTERN);
//
//    public String format(DateTime date) {
//      return formatter.print(date);
//    }
//  }

  public static class DateFormatThread extends Thread {
    Formatter formatter;
    Date date;
    long iterCount;

    public DateFormatThread(Formatter f, Date date, long iterations) {
      this.formatter = f;
      this.date = date;
      this.iterCount = iterations;
    }

    public void run() {
      for (int i = 0; i < iterCount; i++) {
        formatter.format(this.date);
      }
    }
  }

//  public static class DateTimeFormatThread extends Thread {
//    JodaFormatter formatter;
//    DateTime date;
//    long iterCount;
//
//    public DateTimeFormatThread(JodaFormatter f, DateTime date, long iterations) {
//      this.formatter = f;
//      this.date = date;
//      this.iterCount = iterations;
//    }
//
//    public void run() {
//      for (int i = 0; i < iterCount; i++) {
//        formatter.format(this.date);
//      }
//    }
//  }
}
